If you're buying a Mac for pure horsepower you're buying it for the wrong reasons. A custom spec'ed PC will almost always out-muscle a Mac.
That wasn't my point. That came after as I was arguing the logic of the person who tried to side step the point by saying that the iMac was the most powerful. I wasn't say that it had to be the most powerful, just that in its current state, it is outrageous to purchase one at that price.
Which Dell were you talking about? This one?
http://www.anandtech.com/show/5866/dell-xps-one-2710-review-the-premium-allinone
Unless I read it wrong .. It costs the same as high end iMac .. It has IB i7 3770S, but as I said .. It has a weak GPU and only 2 slots of RAM.
In the end the spec is even out each other. But you see they both cost the same, not $800 cheaper nor blows iMac out of water as you claimed earlier.
But then again, maybe I was talking about a wrong Dell AIO
The top tier Dell AIO starting at $1799

apple:$1999)
i7 3.9ghz

apple: has a stock i5 3.1 add $200 for the i7 3.4 = $2199 and STILL underpowered comparatively)
2x4GB ram of DDR3 1600

apple:2x2 DDR3 1333. 2x4 for $100 more [$50 if you shop around] = $2299)
Incidentally, 2 ram slots is not a huge deal. Most can get by with 8gb of ram. If you need 16, you can buy 8gb cards that will cost you, but STILL be cheaper than buying a similarly constructed iMac.
2tb HDD + 64GB SSD

apple: do I even need to go on at this point? Apple stock HDD is 1tb, $150 if you want 2TB and while they don't offer a smaller SSD to compare to, the cheapest option to get a SSD in there at all by them is $450(!!!) more. Let's just say, for the sake of argument, you voided your warranty day one and put your own $100 SSD upgrade and price everything at $2550 right now - even though it is technically at the $2900 range at this point).
Yes, the only thing that hurts it is the GPU. But here is the weird thing about that. Who, but a small amount of people get anything out of that high end GPU anyway? If you bought it to game on, you're more than likely gonna use it to boot camp. Which kinda defeats the purpose of going with the iMac in the first place, and adds another $100 to the price if you were going to obtain Windows in a legal manner.
The Dell also has a blu-ray reader, 6 USB 3 ports, HDMI out and in, optical out, optional tv tuner, etc etc etc.
And STILL at the starting price of $1799.

apple: $2600-$2900).
Go ahead and hold on to that video card argument. Everything else is hands down some of the best stuff on the market today and there will be noticeable gains in almost every aspect with the Dell.